Coupling.



G. L. McCAIN.

coumms. l APPLICATION HLED JUNE 14| 1915.

1,251,065. Patented D.251, 1917. Y

nzrenlo'r:

STATES PATENT OFFICE.

GEORGE L. MUCAIN, OFDETBOIT, lIICHIGAN, ASSIGNOR T0 PACKARD MOTOR CAR COMPANY, 0F DETROIT, MICHIGAN, Af CORPORATION 0F MICHIGAN.

COUPLING.

. Specification of Letters Patent.

Patented Dec. 25, 1917.

`Application Med J une 14, 1915. Serial No. 34,022.

To all whom it may concern.'

Be it known that I GnoncnL. McCain, a citizen of the United States, and resident of Detroit, Wayne county, State of Michigan, have invented certain new and useful Improvements inCouplings, of which the following is a specification.

This lnvention` relates to couplings and particularl 1 to shaft couplings permitting angular a justment of` -one shaft or shaft section relative .to another.

riety of usesaandwis-there ore not limited to the exact form shown in this application, it being understood that this form is illustrative only and various modifications may be made Without'departing from the scope of the invention.:V y

Qne of the objects of the invention is to provide a coupling between two shaft members or Vsectionall that will permit of easy loosening, a setting of the membersl axially, that is, rotatin one of them slightly relativel to theo er, and a 'quick and secure retig toning.'

Further objects are simplicity and cheapness formanufacturing and a desi mitting extreme accuracy of connections.

Other objects will appear` from the'following description, taken in connection with the drawingswhich form a part of this specification, and in which:-

Figure 1 1s a longitudinal sectional view through a coupling embodying -this invention;

Fi 2 is a transverse section approximate y on the line 2-2 of Fig. 1; and

Figs. 3 and 4` are detail views of the wedge nut.

In the drawings the invention is shown as applied to the cam shaft of a hydrocarhon motor and a portion of the crank case or support for the shaft is shown at 10. A fragment of the front cover of the crank case is also shown at 11 and it will be understood that this. cover is preferably detachable but when secured in place it forms a part of the support or crank case 10.

The cam shaft 12 is shown as mounted in a suitable supporting bearing 13, and is preferably formed with a iange 14 to which a. suitable gear (not shown) may be attached :for driving the shaft. The cam shaft 12 is shown as bored out at 15 so that oil may be supplied to the sha1' t nader pressure and fed perthe bore 15.

For the urpose of drivinga suitable ignition distri uter from the cam shaft 12, a member 18 shown in the form of a spiral gearis adapted to becoupled to the forward end of said shaft in such manner that it ma be adjusted angularly relatively to the sha for the purpose of advancing or retarding y v the ignition mechanism relatively to the The invention nds ap hcatlon to a vai crank shaft of the motor. For the purposes of this invention therefore the shaft 12 yand the member 18 are the two members thatl are to be coupled and may 'beconsidered as 4separate shaft members or sections, either V of which may constitute theV drivin member.

The member 12 is shown as en arged at its forward end and formed with a socket as at 20. Inwardly 19 is conical in shape, enlarging as it eX- tends inwardly for some distance. Then Y at its ,base the socket 19 is much smaller in diameter asl at 21, this latter portion of the socket extending into the bore 15 of the cam` shaft but not communicating therewith because ofthe insertion of the plug 17 hereinabovereferred to.

The member 18 is formed with a shoulder 22 which is adapted to accurately t the extreme end of the member 12, and with a cylindrical partl 23 which fits Within the socket member in the zone o f the cylindrical surface 20, this nicely centering the member 18 relatively to the member 12. The member 18 is also formed with an extension 24 which may be termed a pilot and which enters the contracted portion 21 of the socket 19.

It will be seen that when the member 18 is in place in the socket 19, as shown in Fi 1, there is a considerable annular space le between the extension 24 of themember 18 and the conical wall 19 of the socket. this space are arranged a series of nuts 25 which are shown in all of the figures and particularly in detail in Figs. 3 and 4. The surface 26 of each of these nuts fits and slides upon the outer cylindrical surface of the extension 24, and the surface 27 conforms to the conical surface l9y of the interior wall of the socket 19. Thus the nuts These bolts 28 are threaded into the nuts the bolt 32 and a the member 18 re 25 and the nuts are drawn forwardly by turning the bolt. as will .be clearly understood. Any desired number of nuts and bolts may be used, three being shown in the drawings.-

The member 18 is provided with a spring pressed' thrust bolt which is adapted to resist the thrust on the shaft due to the pressure of oilv supplied to the interior of the cam shaft for'lubrica-tion purposesas above described. F or this pur ose the vmember' 18 is drilled out `as-at 29,A t is bore however being slightlycontracted as at 30 vforming a' shoulder 31 against which the thrust bolt 32 may abut. '.The head 33 of the thrust bolt however may extend throuvh the smaller opening 30 for contact with the wearing piece-34 'set in a ca-p 35 which closesthe opening 36. formed -in the cover 1 1 opposite the gear member 18. It will be understood that the thrust -bolt 32 is assembled in the member 18` before the latter is coupled to the member 12 and a spring 32 is laced behind plug 37 c oses the rear opening.

.The cap 35 above referred to may be readily removed for ermitting adjustment of .latively to the member 12.

This adjustment is obtained by slightly losening the three bolts 28, turning the member 18 relative] to the memberV 12 the desired amount am?1 then retightening the bolts 28.

The coupling is assembled by first lacing the three wedge nuts 25 in the .soc et 19, then inserting the member 18 with its pilot 24 in the inner part 21 of the socket 19, and then inserting the bolts 28 through the gear part of the member 18 and into the respective nuts and tightening these bolts so that the nuts are wedged between the cylindrical surface of .the extension 24 and the 'conical wall 19 of the socket 19 of member 12.

Having thus described my invention, what I claim and desire to secure by Letters Patthe member 18.

2. A shaft coupling comprising two mem'- bers to be coupled, one of said members having an end socket with inner walls having axially spaced bearing surfaces of dif- -ferent diameters, and the other of said members having parts adapted to t said bearing surfaces respectively, and means in said" socket for securin said members together.

3. A shaftcou ding comprising two members to be couple ,one of said members having an endsocket with inner walls having axlallyl spaced bearing surfaces of different diameters, and the other of saidmembers having parts adapted to lit said bearing surfaces respectively, 4and means arranged in said socket between the axially spaced surfaces for securing said members together.

4. A shaft coupling comprising two members to be coupled, one of `said members hav-- ing an end socket with inner walls having axially spaced 'bearing surfaces of different diameters, and the other of said members having faces res ectively, and means` in said socket for frictlonally binding said members-together. 1

bers t'o be couple ing an vend socket with inner walls'- having axially spaced bearing surfaoesof different diameters, and the other of said'members having parts adapted to fit said bearing sur-- faces respectivel and means-arranged in said socket Abetween the axially spaced sur-- faces for frictionally binding sai members together.

6. A shaft cou ling comprising two members tobe coupl parts adapted to lit said bearing sur-- 4 -90 '5. A shaftcou Vling comprising two inemone of said members havbers to be coupled, one of said members A being formed with an-end socket-having a conical tapering wall and the other of said members avin a part extending into said socket, meansY or centering the parts relatively, and means arranged between Said wall and said extended part for binding said members together.

8. A shaft coupling comprising two members to be coupled, one of said members bein `formed with an end socket havin a cy indrical bearing surface, and a shou der adjacent the orice thereof and a tapering wall widening axially from said surface, and `the otherof said members having a part to fit said cylindrical surface and an extended part radlally inward' of said tapering-wall,

and a wedge device' between said walliand said extended part for binding said members together.

9. A shaft coupling comprising two members to be coupled, one of said members bein formed with an end socket having a cy indrical bearing surface and a shoulder'l adjacent the orifice thereof and' a tapering l second member having a shoulder abutting' the end of the socket ,member and havin a;

Wall wideningaxially from said surface, and the other of said members having a part to fit said cylindrical surface and an extended part radlally inward of said tapering wall, a wedge nut arranged between said wall and said extended part, andl a bolt extending.` axially through `a part of-one of said members 4for tightening said wedge nut in place. 10. A shaft coupling comprising a socket member having a conical interior wall, a

cylindrical part centered withinthe soc et member, nuts havin surfaces to t said conical wall and cy indrical part respectively, .and bolts in one of said members for 1 tightening said nuts between said Wall and part.

Y 11. The l combination with asupport having a shaft bearing, ofja shaft in said bearn ing formed.' with a socket at one end said support having a part arranged axially in 4` line with and adjacent said end of the shaft,

a member ada ted to be secured within and and adapted to contact with said axiall arranged su port part. 12. A. sha tcoupling comprising a member having an end socket, a gear member having a part extending into said socket, said members having relatively centering means, meansfo'r securing the members together,and a thrust bolt arranged in said gear member and operating inthe extended part thereof.` v

13.'A shaft coupling comprising a mem;

berV having an end socket, a gear member having a art-extending into said socket, said mem rs having relatively centering means, wedge nuts arranged between the interior wall of the socket and said extended part'of the gear member, and bolts passing d through the gear .into the nuts for producing the Wedging action.

removed axia ly from said socket, and a ,spring thrust bolt arranged in said member.

In testimony whereof I aiix `my signature l in the presence of two witnesses.

` Witnesses:

LE R01 J. WILLIAMS, '.CLAm S. COTE. Q.

GEORGE L. MGCAIN, f 

